[FIX] Fix incorrect handling of `path.data` attribute as Array
[FIX] Fix incorrect handling of `path.data` attribute as Array

The `path.data` attribute can be set as a String (`"/my/path1,/my/path2"`),
or an Array (`["/my/path1","/my/path2"]`) and the YAML file must reflect this.

Related: #39

gouketsu/cookbook-elasticsearch,gilt/cookbook-elasticsearch,bavardage/cookbook-elasticsearch,nbudin/cookbook-elasticsearch,zzugg/cookbook-elasticsearch,michaeld/elasticsearch-cookbook,spuder/cookbook-elasticsearch,vacay/vcy-elasticsearch,paulczar/cookbook-elasticsearch,gilt/cookbook-elasticsearch,gouketsu/cookbook-elasticsearch,spuder/cookbook-elasticsearch,nbudin/cookbook-elasticsearch,GemHQ/cookbook-elasticsearch,zzugg/cookbook-elasticsearch,gilt/cookbook-elasticsearch,vacay/vcy-elasticsearch,nbudin/cookbook-elasticsearch,spuder/cookbook-elasticsearch,gouketsu/cookbook-elasticsearch,vacay/vcy-elasticsearch,zzugg/cookbook-elasticsearch